gpu: nvgpu: Add pmgr support

This CL covers the following implementation,
1) Power Sensor Table parsing.
2) Power Topology Table parsing.
3) Add debugfs interface to get the current power(mW), current(mA) and
   voltage(uV) information from PMU.
4) Power Policy Table Parsing
5) Implement PMU boardobj interface for pmgr module.
6) Over current protection.

JIRA DNVGPU-47

Change-Id: I7b1eefacc4f0a9824ab94ec8dcebefe81b7660d3
Signed-off-by: Lakshmanan M <lm@nvidia.com>
Reviewed-on: http://git-master/r/1217189
(cherry picked from commit ecd0b16316cb4110118c6677f5f03e02921c29b6)
Reviewed-on: http://git-master/r/1241953
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 143 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/pmgr/pmgr.c b/drivers/gpu/nvgpu/pmgr/pmgr.c
new file mode 100644
index 00000000..f625e37d
--- /dev/null
+++ b/drivers/gpu/nvgpu/pmgr/pmgr.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include "gk20a/gk20a.h"
+#include "pwrdev.h"
+#include "pmgrpmu.h"
+#include <linux/debugfs.h>
+
+#ifdef CONFIG_DEBUG_FS
+static int pmgr_pwr_devices_get_current_power(void *data, u64 *val)
+{
+        struct nv_pmu_pmgr_pwr_devices_query_payload payload;
+        int status;
+        struct gk20a *g = (struct gk20a *)data;
+
+        status = pmgr_pmu_pwr_devices_query_blocking(g, 1, &payload);
+        if (status)
+                gk20a_err(dev_from_gk20a(g),
+                        "pmgr_pwr_devices_get_current_power failed %x",
+                        status);
+
+        *val = payload.devices[0].powerm_w;
+
+        return status;
+}
+
+static int pmgr_pwr_devices_get_current(void *data, u64 *val)
+{
+        struct nv_pmu_pmgr_pwr_devices_query_payload payload;
+        int status;
+        struct gk20a *g = (struct gk20a *)data;
+
+        status = pmgr_pmu_pwr_devices_query_blocking(g, 1, &payload);
+        if (status)
+                gk20a_err(dev_from_gk20a(g),
+                        "pmgr_pwr_devices_get_current failed %x",
+                        status);
+
+        *val = payload.devices[0].currentm_a;
+
+        return status;
+}
+
+static int pmgr_pwr_devices_get_current_voltage(void *data, u64 *val)
+{
+        struct nv_pmu_pmgr_pwr_devices_query_payload payload;
+        int status;
+        struct gk20a *g = (struct gk20a *)data;
+
+        status = pmgr_pmu_pwr_devices_query_blocking(g, 1, &payload);
+        if (status)
+                gk20a_err(dev_from_gk20a(g),
+                        "pmgr_pwr_devices_get_current_voltage failed %x",
+                        status);
+
+        *val = payload.devices[0].voltageu_v;
+
+        return status;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(
+                pmgr_power_ctrl_fops, pmgr_pwr_devices_get_current_power, NULL, "%llu\n");
+
+DEFINE_SIMPLE_ATTRIBUTE(
+                pmgr_current_ctrl_fops, pmgr_pwr_devices_get_current, NULL, "%llu\n");
+
+DEFINE_SIMPLE_ATTRIBUTE(
+                pmgr_voltage_ctrl_fops, pmgr_pwr_devices_get_current_voltage, NULL, "%llu\n");
+
+static void pmgr_debugfs_init(struct gk20a *g) {
+        struct gk20a_platform *platform = dev_get_drvdata(g->dev);
+        struct dentry *dbgentry;
+
+        dbgentry = debugfs_create_file(
+                                "power", S_IRUGO, platform->debugfs, g, &pmgr_power_ctrl_fops);
+        if (!dbgentry)
+                gk20a_err(dev_from_gk20a(g),
+                                "debugfs entry create failed for power");
+
+        dbgentry = debugfs_create_file(
+                                "current", S_IRUGO, platform->debugfs, g, &pmgr_current_ctrl_fops);
+        if (!dbgentry)
+                gk20a_err(dev_from_gk20a(g),
+                                "debugfs entry create failed for current");
+
+        dbgentry = debugfs_create_file(
+                                "voltage", S_IRUGO, platform->debugfs, g, &pmgr_voltage_ctrl_fops);
+        if (!dbgentry)
+                gk20a_err(dev_from_gk20a(g),
+                                "debugfs entry create failed for voltage");
+}
+#endif
+
+u32 pmgr_domain_sw_setup(struct gk20a *g)
+{
+        u32 status;
+
+        status = pmgr_device_sw_setup(g);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "error creating boardobjgrp for pmgr devices, status - 0x%x",
+                        status);
+                goto exit;
+        }
+
+        status = pmgr_monitor_sw_setup(g);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "error creating boardobjgrp for pmgr monitor, status - 0x%x",
+                        status);
+                goto exit;
+        }
+
+        status = pmgr_policy_sw_setup(g);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "error creating boardobjgrp for pmgr policy, status - 0x%x",
+                        status);
+                goto exit;
+        }
+
+#ifdef CONFIG_DEBUG_FS
+        pmgr_debugfs_init(g);
+#endif
+
+exit:
+        return status;
+}
+
+u32 pmgr_domain_pmu_setup(struct gk20a *g)
+{
+        return pmgr_send_pmgr_tables_to_pmu(g);
+}